Automatic cut-off for pumps.



No. 000,003. PATBNTED SEPT, '10, 1005.

J. MURPHY.

AUTOMATIC CUT-OFF FOR PUMPS. APPLICATION FILED MAR. 27. 1905.

2 8HEET8-SEEET 1.

ZZZaf Jdcm' 1 720622507 @EEi/J/W' (if/I/Z/di 771w No. 800,003. PATENTEDSEPT. 19, 1905. J. MURPHY.

AUTOMATIC GUT-OFF FOR PUMPS.

APPLIOATION FILED mam. 1905.

2 SHEETS-SHEET 2.

H I A UNITED STATES PATENT OFFICE.

JEREMIAH MURPHY, OF LEADVILLE, COLORADO, ASSIGNOR TO CHARLES T.CARNAHAN, OF LEADVILLE, COLORADO.

AUTOMATIC CUT-OFF FOR PUMPS.

Specification of Letters Patent.

Patented Sept. 19,1905.

Application filed March 2'7, 1905. Serial No. 252,335.

To all whom it may concern.-

Be it known that I, JEREMIAH MURPHY, a citizen of the United States,residing at Leadville, in the county of Lake and State of Colorado, haveinvented new and useful Improvements in Automatic Cut-Offs for Pumps, ofwhich the following is a specification.

This invention relates to automatic cut-offs particularly adapted foruse in automatically cutting off motive fluid to a pump, although thesame is adapted to any use for which it is found applicable, and theobject thereof is to provide an automatic cut-off which will be throwninto operation if the pump should jar, thereby cutting oif the supply ofmotive fluid, causing automatically the discontinuing of the operationof the pump, thereby pre venting the pump becoming injured.

The invention further aims to provide an automatic cut-off for pumps orfor other purposes for which it is applicable which shall be simple inits construction, strong, durable, automatic and instantaneous in itsoperation, efiicient in its use, and comparatively ineX- pensive to setup.

WVith the foregoing and other objects in view the invention consists inthe novel construction, combination, and arrangement of partshereinafter more specifically described, illustrated in the accompanyingdrawings, which form a part of this specification, and particularlypointed out in the'claims hereunto appended.

In describing the invention in detail reference is had to theaccompanying drawings, wherein like reference characters denotecorresponding parts throughout the several views, and in which Figure 1is a side elevation of a doubleacting pump, showing the automaticcut-off in accordance with this invention arranged in operative relationwith respect to the pump. Fig. 2 is an end elevation thereof. Figs. 3and 4 are respectively a side and end elevation of the support for thegravity-operating trip-bar. Fig. 5 is an end view showing thearrangement of the gravity-operating tripbar with respect to itssupport, and Fig. 6 is a like view showing the trip-bar in its operativeposition.

Referring to the drawingsby reference characters, 1 denotes thedouble-acting pump, and 2 the motive-fluid-supply pipe, which isprovided with an automatically operating below the pipe 2. A pair ofseats 5 is provided for the valves 3.

When the device is used in connection with a double-acting pump, a pairof supports is provided. If used in connection with a singleacting pump,but one support is necessary.

The reference character 6 denotes the supports which are secured to thepump in any suitable manner and are substantially of inverted-L shape.The upper face of the horizontal member of each of the supports isprovided with a pair of indentations, as at 7. Each of the supports 6 isalso provided with guides 8 retained in position by the setscrews 9.Extending through the guides 8 are the gravity-operating trip-bars 10,carrying on their lower ends the weights l1 and having a curved upperportion 12, which terminates in a horizontally-extending portion 13,adapted to project over the horizontally-extending portion of thesupports, and the said horizontally-extending portions 13 are providedwith a pair of barbs 14, which are adapted to find a seat in theindentations 7 The arrangement of the bars 10 with respect to thesupports 6 is such that on the least jar of the pump the rods will becaused to move off the supports 6, and consequently, owing to the actionof the weights 11, the bars 10 will fall by gravity, thereby throwinginto operation automatically the cut-off.

To each of the bars 10 is connected, as at 14, a pair of pulling-arms15, suitably secured at their upper ends, as at 16, to thecounterweighted rock-arm 17, which is mounted in the bearing 18 andcarries near one end the crank-arm 19, which is pivoted, as at 20, to apulling-arm 21, pivoted, as at 22, to a bolt 23,

extending through alatoh 24:, depending from the pipe 2. Depending fromthe pipe 2 is a hanger 25, to which is pivoted one end of a trip-lever,26, as at 27. Said lever 26 is also connected, as at 28, to the lowerend of a stem 4 and has its free end bent at an angle, as at 29, whichis adapted to rest upon the bolt 23 when the mechanism which constitutesthe cut-off is set up ininoperative position.

The manner in which the cut-off operates is as follows: In case anythingshould happen to the pump or motive-fluid pipe-such as water in thesteam-cylinders, pistons overreaching gaskets, blowing on pump or watercolumn, dropping a valve, getting air in the watercylinder, or anythingelse that endangers the pump being broken or will cause the pump to jaror jump during the strokethis jar or jump causes the barbs 14: to bethrown out of the indentations 7 and which will cause the bars 10 tofall by gravity, thereby carrying the elements 15 therewith, rocking thearm 17, moving the crank 18 in one direction, which in turn carries thearm 21 therewith, the latter moving the bolt 23 from beneath theright-angular portion 29 of the lever 26, causing the lever 26 to fall,which in turn carries the stem and causes the valves 3 to be comeseated, thereby cutting of]? the supply of motive fluid anddiscontinuing the operation of the pump.

Although, preferably, the gravity-operat ing trip-bars 10 are displacedoff the support 6 through the means of a jar, yet the cut-off can be soadjusted that when the pump eX- ceeds the maximum speed limit settherefor the gravity-operating trip-bars 10 will be displaced, so as toautomatically out 01f the supply of motive fluid, the displacing of thetripbars causing the operation of the mechanism in a manner ashereinbefore referred to.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. An automatic cut-ofl' for motive fluid, comprising means operated bya jar of a pump or engine for throwing the cut-off into operation,thereby closing the supply of motive fluid.

2. An automatic cut-offfor motive fluids, comprising avertically-movableand gravityoperable mechanism operated by a jar of apump or engine for throwing the cutoff into operation, thereby closingthe supply of motive fluid.

3. An automatic cut-off for motive fluid, comprising the combinationwith a motivefluid-supply pipe, of a.valve for opening and closing saidpipe, and mechanism operated by a jar of a pump or engine and connectedwith said valve for automatically operating it, thereby closing the saidpipe.

4:. An automatic cut-off for motive fluid, comprising the combination ofa supply-pipe and a valve for opening and closing said pipe, ofmechanism connected with said valve for closing it, and agravity-operable trip-bar operated by a jar of a pump or engine andconnected with said mechanism for operating it, thereby closing saidvalve.

5. An automatic cut-off for motive fluid, comprising the combination ofa supply-pipe and a valve for opening and closing said pipe, of a leverconnected with said valve for closing it, a latch mechanism forretaining the lever in an elevated position, thereby retaining the valveopen, and mechanism operated by a jar of a pump or engine and connectedwith said latch mechanism and adapted when operated to operate the latchmechanism,there by permitting the lever to fall, thereby closing thevalve.

6. An automatic cut-ofl' comprising a support provided with a pair ofindentations, a gravity-operating bar having a pair of barbs adapted tobe seated in said indentations and suspended by said support, said barthrown ofl' the support by a jar, a motive-fluid-supply pipe, a valvefor opening and closing said pipe, a lever for retaining said valve inits open position, a latch for supporting said lever, thereby retainingthe valve open, and mechanism connected with the bar and with the latchand adapted when the bar isoperated to shift the said latch, therebypermitting the lever to fall and the valve to close.

7. The combination with a pump and a motive-fluid-supply pipe therefor,of a valve for opening and closing said pipe, and means connected withthe valve and operated when the pump jars for automatically closing saidvalve.

'8. An automatic cut-off comprising a support provided with a pair ofindentations, an automatically-displaceable gravity-operating bar havinga pair of barbs adapted to be seated in said indentations and suspendedby said support, a motive-fluid-supply pipe, a valve for opening andclosing said pipe, a lever for retaining said valve in its openposition, a latch for supporting said lever, thereby retaining the valveopen, and mechanism connected with the bar and with the latch andadapted when the bar is displaced to shift the latch, thereby permittingthe lever to fall and the valve to close.

9. An automatic cut-off comprising a support, a vertically-movable andautomaticallydisplaceable gravity-operating bar suspended by saidsupport, a motive-fluid-supply pipe, a valve for operating and closingsaid pipe, a lever for retaining said valve in its open position, alatch for supporting said lever, thereby retaining the valve open, andmechanism connected with the bar and with the latch and adapted when thebar is displaced to shift the latch, thereby permitting the lever tofall and the valve to close.

10. An automatic cut-off for motive fluids, comprising the combinationof a supply-pipe, and a valve for opening and closing said pipe, of alever connected with said valve for closing it, a mechanism forretaining the lever in an elevated position, thereby retaining the valveopen, and a vertically-movable and automatically displaceable gravityoperating bar connected with said mechanism and adapted when displacedto operate the said mechanism, thereby permitting the lever to fall andthe valve to close.

11. An automatic cut-off for motive fluids, comprising the combinationof a supply-pipe and a valve for opening and closing said pipe, of amechanism connected with said valve for and with the valve and adaptedwhen the bar is displaced off of said support to close the valve.

In testimony whereof I have hereunto set 5 my hand in presence of twosubscribing witnesses.

JEREMIAH MURPHY.

Witnesses:

JOHN A..EWING, ERNESTINE KUEHL.

